Heat-insulated receptacle



PatentedAug. 22, 1922.

. ANTHON G. C HEAT'INSULATED RECEPTACLE.

APPLICATION FILED NOV. I, I9|9. 1,426,446.

. bridge in that it has the desired .are made of metal, such as steel,

UNITED sr GEORGE GJANTHON, OF NEW YORK, N. Y., ASSIGNR T0 STANLEY rNSUaA'rINQ f coMPANY, oF GREAT BARRINGTON, MASSACHUSETTS, A ooRPoRATmN QF v MAINE.

HEAT-INSULATED REC TJITACLE.v

-Specication of Letters Patent.

Patented Aug'. 22, 1922.

Application led November 1', 1919. Serial No. 335,126.

To all whom. t may concern:

Be it known that I, GEORGE C. ANTHON, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful `Improvements in Heat-Insulated Receptacles, of which the following is a speciiiy cation; v

This invention relates to thermally insulated receptacles of the type generally known as vacuum bottles and particularly to those in which the spaced shells of the receptacle gether at the neck of the bottle as by means of welding. This joinder of the inner and outer shells provides in leffect a thermal bridge between the'two shells across which a transfer of heat may take place, and which therefore detracts to a certain extent vfrom the 'efficiency of the device.

One of the objects of my invention is to reduce, so far as possible, these heat losses through the neck or`connecting bridge between the two shells; and further to accomplish this result without impairing the physical structure of the vessel or interfering with the securing of the parts together by means of -welded joints.

Another/object of the invention is to so 'construct the parts that the inner and outer shell may be held fixed in spaced relation wholly by means ofthe connect-ion between the neck portions of the two shells.

In accomplishing the above named objects I have found-it desirable to use av connecting neckiece between the inner and 'outer shells ma e of amaterial which is of greater thermal resistivity than the material of the shells. In the case of steel shells I have found that a Special valloy of nickel and copper (50% nickel and v50% copper) is well suited for the purposes of this thermal an enamell coat, having the characteristics the manner set forth in a coof Herbert M. Smith This enamel fcoat adthe interior surface of and applied'in pending application erial No. 256,283.

heres well enough to more or less broad than those joined toably made of the [duced to a ring thermal rethe inner steel Shell, but some difficulty has en experlenced 1n causing it to adhere to the surfaoeof the alloy connecting piece.4 objection that I have i invented the method of treatment, including- It 1s to overcome this the enameling step, hereinafter 0th set forth.

er objects and aims'of the invention, stated above, inherent, will part vspecifically of the following the elements, combinations, U parts, and applications of principles constitutlng the invention; and the scope of protection contemplated will ap cai; from the claims.

together with the advantages be 1n part obvious and in this drawing, there is shown an outer shell l and an inner shell 2, the closed at the bottom as shown, and-the space between the nshells providing an evacuated space, whlch may be'iill'ed with finely divided insulated material indicated at 3. The

Outer shell being upper or mouth end of the outer shell is reduced as shown, and connecting the end of the outer shell, interiorly thereof, with the endof the inner shell 2, there is a tubular connecting member indicated at 4, lpreferalloy above referred to, or one having Similar properties. The connections between the V ner and out'er shells are the welded joints 5 and 6, and it will be observed that the end i of the inner shell is flanged to receive one end of the connecting member 4, while 'the extreme end of the outer shell isalso reform so as to afford ample surface-to-surface contact between the outer shell and the connecting member. After the shells and the connecting member have been connected together `by means of the welded joints 5 and 6 the ground coat of enamel material, such` as set forth in the Smith application above mentioned, is applied to the interior of the inner shell, substantially in the manner set forth lin said application, except that none of the ground coat material is allowed to remain on the inbridge piece 4 and the interior sur-face of the connecting member 4, l

this surfacebe'ing wiped clean before the ground coat 1s burned on. The article, with the ground coat materialcovering the interior ofthe inner shell, except for the con fnecting piece, as stated, is now put into a Ament is to give the interior of the inner shell p (except for the connecting member 4) a ground coat of enamel, and to oxidize the interior surface of the connecting member. A second application of enamel material is now put on the entire inner surface of the inner shell including also this time the interior of the neck piece, and the article is again utin the furnace and subjected to a somew at lower: temperature, asdescribed in the aforesaid Smith application, the result being to give the interior of theinner shell, except for the connecting member 4, a second enamel coat which adheres closely to the ground coat thereunder, and to give to the interior of the connecting member 4 a coating of enamel which adheres to the surface .of the connecting memberv by reason of the preliminary oxidation thereof above described, and which is in the natureof a ground coat fort-he interior of the connecting member. QA third coat of enamel may be applied if desired adhering to the second enamelcoat of the body portion of the shell and to the firstv coat of the connecting member.

By following the operations above set forth I am enabled to utilize a connecting member having the desirable thermal re sisti'vity and readily weldable to the metal of the shells, and can provide the neck piece form with the enamel coating of the body y .but less adherent to an enamel or vitreous with an enamel coatingv substantially uniportion of the inner I claim 1. Themethod of constructing a vacuum receptacle, which comprises providing an shell.

- outside shell having a bottom and a mouth portion, the mouth portion being offmetal, placing within and in spaced relation to the outer shell, a second but shorter shell with a metallic mouth portion and a closed bottom, connecting the .neck portions of the two shells by welding to the mouth portions thereof respectively the ends of a tubular connecting member made of a metal different from the metal of the mouth portions of the two shells andof higher thermal re-` sistivity, but less adherent to an enamel or vitreous coat, whereby the connecting member is an integral part of the inner shell and holds the two shells in spaced relation,

treating the interior surface'of the connecting member to rende-r it more adherent to an enamel or vitreous coat, and applying a continuous enamel or vitreous coat on the interior of the shell and connecting member.

2. The method of constructing a vacuum receptacle, which comprises providing an youtside shell having a bottom and a mouth portion, the mouth portion being of metal, placing within and in spaced relation to the outer shell, a second but shorter shell with a metallic mouth portion and a closed bottom, connecting the neck portions of the two shells by welding to the mouth portions .holds the two shells in spaced relation, o'xi dizing the interior surface of the connecting member to render it more adherent to an enamel 'or vitreous coat, and applying a continuous ena-mel or vitreous coat o-n the inte-vv rior of the shell and connecting member.

3. rIhe method of constructing a vacuum receptacle, which comprises providing' an outside shell having a bottom and a mouth portion, the' mouth portion being of metal, placing within and in spaced relation to the outer shell, a second but shorter shell with a metallic mouth portion and a closed bottom, connecting the neck portions of the two shells by welding to the mouth portions thereof respectively the ends of a tubular connecting member made of a metaldifl'erent from the metal of the mouth portions of the two shells and of higher thermal resistivity coat, whereby the connecting member is an integral part of the inner shell and holds the two shells in spaced relation, applying enamel material to theinterior surface of the inner shell while leaving the interior surface of the connecting member uncoated, applying heat to the article to vitrify the enamel material and to simultaneously oxidize the uncoated interior surface of theconnecting member, then applying another and continuous coat of enamel material over the enameled interior surface of the inner shell and the'oxidized surface of the connecting member, and then applying heat to vtrify the second enamel coat to cause it to adhere l to. thev first coat of the inner shell and the oxidized surface of the connecting member. In testimony whereof I aflix my signature.

GEORGE C. ANTHON. 

